An ancient human species called Homo naledi made headlines last week after bones were unearthed in an underground cave in South Africa. To visualize what the distant human ancestor may have looked like, paleoartist John Gurche was tasked with reconstructing the homonin based off of clues from its fossils. Comparing himself to a CSI investigator, he takes in every detail—from eye socket width to jawline strength—to make well-informed assumptions on nose shape, skin color and even hairline—and the finished product is incredibly lifelike. Watch Gurche as he rebuilds Homo naledi on National Geographic.